Abutment for Implant

ABSTRACT

An abutment connecting a crown that forms an external form of an artificial tooth to a fixture embedded in a gum of a human, and comprising a body, a combination portion formed at an end of the body and combined with the fixture, a threaded portion formed at the body and penetrating through the body, a fixing screw being inserted into the threaded portion to couple the body to a processing device or a jig, a coupling hole formed at the body and penetrating through the body, a coupling unit being inserted into the coupling hole to connect the body and the fixture, and a sectional surface formed at an opposite portion to the combination portion and connected to the processing device or the jig, to position the body in the processing device or in the jig when the body is coupled to the processing device or the jig.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the U.S. national phase of International Patent Application No. PCT/KR2011/007199 filed Sep. 29, 2011, which claims the benefit of Korean Patent Application No. 10-2011-0050035 filed May 26, 2011, the entire content of which is incorporated herein by reference.

FIELD OF THE INVENTION

Embodiments relate to an abutment for implant, and more particularly to the shape of an abutment which allows a customized abutment responding to characteristics of individual teeth of each patient to be obtained by precise processing.

BACKGROUND

An implant is an artificial tooth implanted into an alveolus when a tooth is lost or damaged. The implant has the following advantages: it allows only a lost or damaged tooth to be replaced without sacrificing adjacent teeth, it allows the artificial tooth to function like a natural tooth, it looks and feels like a natural tooth, it allows a patient to speak clearly after an operation, and it quickly improves the patient's oral health.

A general implant comprises a fixture embedded in the gum, an abutment fixed to the fixture by using a screw, and a crown fixed onto the abutment so as to give an external form of an artificial tooth. At this case, the abutment supports the crown.

Here, the abutment (hereinafter, referred to as a processing object) functions to transfer a load from the crown to the fixture, and hence to the jaw bone. For this reason, the processing object should be manufactured considering not only a size, a shape, and a contour of an artificial tooth, but also the occlusion with adjacent teeth and an opposing tooth (an upper tooth or lower tooth), and dental characteristics, conditions of the gum, and the gum line of an individual patient.

As for the processing object of the implant, customized products manufactured so as to correspond to patient's teeth are preferred to generic products having fixed sizes.

SUMMARY

An embodiment of the invention provides an abutment for implant which improves processing precision of the abutment by allowing the abutment to be precisely and accurately positioned and fixed in the correct position in a processing device or a jig when the abutment is processed to become a customized abutment which requires high precision.

In one embodiment, there is an abutment connecting a crown that forms an external form of an artificial tooth to a fixture embedded in a gum of a human and comprises a body, a combination portion formed at an end of the body and combined with the fixture, a threaded portion formed at the body and penetrating through the body, a fixing screw being inserted into the threaded portion to couple the body to a processing device or a jig, a coupling hole formed at the body and penetrating through the body, a coupling unit being inserted into the coupling hole to connect the body and the fixture, and a sectional surface formed at an opposite portion to the combination portion and connected to the processing device or the jig, to position the body in the processing device or in the jig when the body is coupled to the processing device or the jig.

The abutment may further comprise an installation portion formed at another end of the body and installing the body in the processing device or the jig, and the sectional surface may be formed at the installation portion.

The installation portion may be taped as the sectional surface is far from the body.

The abutment may further comprise a recess portion formed between the body and the installation portion.

The installation portion may have an outer diameter smaller than an outer diameter of the body.

The installation portion may have a surface of a D shape or a polygonal shape.

The sectional surface may be formed at a portion of a side of the body.

The body may have a surface of a letter D shape or a polygonal shape, which is in contact with the sectional surface.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIGS. 1A, 1B and 1C are diagrams illustrating an abutment for implant according to an embodiment of the invention, respectively;

FIGS. 2A, 2B and 2C are diagrams illustrating an abutment for implant according to another embodiment of the invention, respectively; and

FIGS. 3A, 3B and 3C are diagrams illustrating a material of an abutment for implant according to another embodiment of the invention, respectively.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings.

An abutment for implant according to each embodiment of the invention is for producing a final abutment which connects a fixture embedded in the gum to a crown forming an external form of an artificial tooth.

FIGS. 1A, 1B and 1C are diagrams illustrating an abutment for implant according to an embodiment of the invention, respectively.

As illustrated in FIGS. 1A, 1B and 1C, an abutment 10 for implant according to the embodiment comprises a body 100 having a cylindrical shape, an installation portion 200 which is integrally formed with an end of the body 100 and serves as a portion to install the body 100 in a processing device or in a jig when a customized abutment (that is, a final abutment) is produced by processing the body 100, a combination portion 300 formed at the other end of the body 100 so as to be combined with a fixture, a threaded portion 400 formed to penetrate through the installation portion 200 and to pass through a portion of the body 100 so that a fixing screw can be inserted into the threaded portion and thus the body 100 is fixed to the processing device or the jig, and a coupling hole 500 which is formed to penetrate through the body 100 and the combination portion 300 in a longitudinal direction of the body 100 so that a coupling unit (not shown) used to couple the body 100 to the fixture can be inserted into the coupling hole 500.

The installation portion 200 is tapered to an outside portion of the body 100, that is, from the body 100 to an end of the installation portion 200. Thus, the installation portion 200 is taped as the sectional surface 21 is far from the body 100.

Thereby, an external diameter of the installation portion 200 is changed from the body 100 to the end of the installation portion 200. For example, as shown in FIGS. 1A and 1B, the external diameter of installation portion 210 decreases from the body 100 to the end of the installation portion 200.

The installation portion 200 further comprises a sectional surface 210 (that is, a cut portion) used for positioning when the installation portion 200 is coupled to the processing device or the jig. The sectional surface 210 is formed by cutting a part of the installation portion 200. The sectional surface 210 is formed at a portion of a side of the installation portion 200.

Alternatively, the sectional surface 210 may be plural. In this case, at least two sectional surfaces 210 formed at at least two portions of the side of the installation portion 200 have different shaped from each other, or all of the section surfaces 210 may have the same shape as each other.

Thereby, the installation portion 200, that is, a surface (for example, a bottom surface) of the installation portion 200 has a polygonal shape or a letter D shape, and thus, a planar shape of the installation portion 200 is also a polygonal shape or a letter D shape. In the installation portion 200, the bottom surface of the installation portion 200 is opposite a surface contacting to the body 100.

The threaded portion 400 has threads corresponding to threads of a fixing screw.

As described above and shown in FIG. 1( c), the threaded portion 400 is formed by penetrating through a portion of the body 100 as well as the installation portion 200 in the longitudinal direction of the body 100. Thereby, the threaded portion 400 is formed at the installation portion 200 and the body 100.

As described above and shown in FIG. 1( c), the coupling hole 500 is formed by penetrating through a portion of the body 100 as well as the combination portion 300. Thereby, the coupling hole 500 is formed at the combination portion 300 and the body 100.

FIGS. 2A, 2B and 2C are diagram illustrating an abutment for implant according to another embodiment of the invention, respectively.

As illustrated in FIGS. 2A, 2B and 2C, an abutment 10 a for implant according to the embodiment of the invention comprises a body 100 a, an installation portion 200 a, a combination portion 300 a, a recess portion 600 a, a threaded portion 400 a, and a coupling hole 500 a.

The installation portion 200 a is integrally formed with an end of the body 100 a and is used to install the body 100 a in a processing device or in a jig when the body 100 a is processed to produce a customized abutment (that is, a final abutment).

The combination portion 300 a is formed at the other end of the body 100 a so as to be combined with the fixture.

The recess portion 600 a is formed between the body 100 a and the installation portion 200 a to provide an installation reference plane 700 a of the body 100 a when the body 100 a is fixed.

Thereby, a portion of the installation portion 200 a is separated from the body 100 a by the recess portion 600 a.

Unlike the installation portion 200 of FIG. 1, the installation portion 200 of the embodiment has the same external diameter as a position of the installation portion 200 a is changed from the body 100 to the end of the installation portion 200 a along the longitudinal direction of the body 100 a.

The threaded portion 400 a is formed to penetrate through the installation portion 200 a and to pass through to a midway portion of the body 100 a in the longitudinal direction of the body 100 a so that a fixing screw used to fix the body 100 to the processing device or the jig may be inserted into the threaded portion 200 a.

As described above and shown in FIG. 2( c), the threaded portion 400 a is formed by penetrating through a portion of the body 100 a as well as the installation portion 200 a and, thereby, the threaded portion 400 a is formed at the installation portion 200 a and the body 100 a.

The coupling hole 500 a is formed to penetrate through the body 100 a and the combination portion 300 a along the longitudinal direction of the body 100 a so that a coupling unit used to couple the body 100 a to the fixture may be inserted into the coupling hole 500 a.

Thereby, as described above and shown in FIG. 2( c), the coupling hole 500 a is formed by penetrating through a portion of the body 100 a as well as the combination portion 300 a. Thus, the coupling hole 500 a is formed at the combination portion 300 a and the body 100 a.

The installation portion 200 a is formed to be smaller than an outer diameter of the body 100 a and, thereby, the installation portion 200 a has an outer diameter smaller than the outer diameter of the body 100 a. Moreover, the installation portion 200 a has the sectional surface 210 a (that is, a cut portion) used to position the body 100 a in the processing device or the jig when the body 100 a is coupled to the processing device or the jig.

The sectional surface 210 a is formed by cutting a part of the installation portion 200 a. The sectional surface 210 a is formed at a portion of a side of the installation portion 200 a.

Alternatively, the sectional surface 210 a may be plural. In this case, at least two sectional surfaces 210 a formed at at least two portions of the side of the installation portion 200 a have different shaped from each other, or all of the section surfaces 210 a may have the same shape as each other.

Thereby, the installation portion 200 a, that is, a surface (for example, a bottom surface) of the installation portion 200 a has a polygonal shape or a letter D shape and thus, a planar shape of the installation portion 200 is also a polygonal shape or a letter D shape. In the installation portion 200 a, the bottom surface of the installation portion 200 a is opposite a surface contacting to the body 100 a.

Moreover, the threaded portion 400 a has threads corresponding to threads of the fixing screw. FIGS. 3A, 3B and 3C are diagrams illustrating an abutment for implant according to another embodiment of the invention.

As illustrated in FIG. 3, an abutment 10 b for implant according to an embodiment of the invention comprises a body 100 b, a combination unit 300 b formed at a portion of the body 100 b so as to be combined with a fixture, a threaded portion 400 b formed to extend from an installation reference plane 700 b to a midway portion of the body 100 b in a manner of passing through the body 100 b in a longitudinal direction of the body 100 b so that a fixing screw used to couple the body 100 b to a processing device or a jig may be inserted into the threaded portion 400 b, and a coupling hole 500 b formed to penetrate through the body 100 b and the combination portion 300 b the longitudinal direction so that a coupling unit used to couple the body 100 b to the fixture may be inserted into the coupling hole 500 b.

Moreover, the other end of the body 100 b in which the combination portion 300 b is located comprises a sectional surface 210 b used to position the body 100 b in the processing device or in the jig.

The sectional surface 210 b is formed by cutting a part of the body 100 b. The sectional surface 210 b is formed at a portion of a side of the body 100 b.

Alternatively, the sectional surface 210 b may be plural. In this case, at least two sectional surfaces 210 b formed at at least two portions of the side of the body 100 b have different shaped from each other, or all of the section surfaces 210 b may have the same shape as each other.

Thereby, the body 100 b, that is, a surface (for example, a bottom surface) of the other end of the body 100 b has a polygonal shape or a letter D shape, and thus, a planar shape of the body 100 b is also a polygonal shape or a letter D shape. In the installation portion 200 a, the bottom surface of the body 100 b is opposite the combination portion 300 a and the coupling hole 500 b formed at one end of the body 100 b.

Moreover, the threaded portion 400 b preferably has threads corresponding to threads of the fixing screw.

As described above and shown in FIG. 3( c), the threaded portion 400 b is formed by penetrating through a portion of the body 100 b, and, thereby, the threaded portion 400 b is formed at the body 100 a.

As described above and shown in FIG. 3( c), the coupling hole 500 b is formed by penetrating through a portion of the body 100 b and the combination portion 300 b. Thereby, the coupling hole 500 b is also formed at the body 100 b and the combination portion 300 b.

Based on the above description referring to FIGS. 1 to 3, each abutment 10, 10 a or 10 b comprises the sectional surface 210, 210 a or 210 b formed at an opposite portion to the combination portion 310, 310 a or 310 b and connected to the processing device or the jig, to position the body 100, 100 a or 100 b in the processing device or in the jig when the body 100, 100 a or 100 b is coupled to the processing device or the jig.

Also, referring to FIGS. 1 and 2, each of the installation portions 200 and 200 a is e formed at each of another ends of the bodies 100 and 100 a and installs each body 100 or 100 a in the processing device or the jig, and the sectional surface 210 and 210 a is formed at the installation portion 200 and 200 a.

As illustrated in FIGS. 1 to 3, each of the combination portions 300, 300 a, and 300 b according to the embodiments are an internal type. Alternatively, at least one of the combination portions 300, 300 a, and 300 b may be an external type.

As described above, when the customized abutment of each embodiment, which is required to be precisely processed, is produced using an abutment 10, 10 a, or 10 b, the abutment 10, 10 a, or 10 b for implant according to each embodiment is precisely and accurately installed and fixed in the correct position in a simple manner in the processing device or the jig by using the threaded portions 400, 400 a, or 400 b and fixing screws horizontally coupled to an abutment 10, 10 a, or 10 b installed in the processing device or the jig, without using a way of clamping or gripping the outer surface of the abutments 10, 10 a or 10 b. Accordingly, it is possible to improve throughput and precision when the customized abutments are produced.

In each abutment 10, 10 a, or 10 b for implant according to the embodiments of the invention, the installation portion 200 or 200 a or the body 100 b is formed to have the sectional surfaces 210, 210 a, and 210 b of the letter D shape or a polygonal shape. At this time, each of the sectional surfaces 210, 210 a, and 210 b is formed in at least one part of the installation portions 200 and 200 a or the body 100 b.

Each of the installation portion 200 or 200 a is opposite the combination portion 310, 301 a, 310 b, and the part of the body 100 b, on which the sectional surface 210 b is formed, is adjacent to the end of the body 100 b opposite the installation portion 200 b.

Thereby, the sectional surfaces 210, 210 a and 210 b are formed at an opposite portion to the combination portion 310, 301 a and 310 b, and the opposite portion is a portion near where the threaded portions 400, 400 a and 400 b are formed.

Therefore, as compared with an abutment which is circular in shape, when each of the abutments 10, 10 a, and 10 b is coupled to the processing device or the jig by using a fixing screw, the positioning of each abutment 10, 10 a, or 10 b may be conveniently and easily performed by the sectional surfaces 210, 201 a and 210 b. 

1. An abutment for implant comprising: a body; a combination portion formed at an end of the body and combined with the fixture; a threaded portion formed at the body and penetrating through the body, a fixing screw being inserted into the threaded portion to couple the body to a processing device or a jig; a coupling hole formed at the body and penetrating through the body, a coupling unit being inserted into the coupling hole to connect the body and the fixture; and a sectional surface formed at an opposite portion to the combination portion and connected to the processing device or the jig, to position the body in the processing device or in the jig when the body is coupled to the processing device or the jig.
 2. The abutment of claim 1, further comprising an installation portion formed at another end of the body and installing the body in the processing device or the jig, and the sectional surface is formed at the installation portion.
 3. The abutment of claim 2, wherein the installation portion is taped as the sectional surface is far from the body.
 4. The abutment of claim 2, further comprising a recess portion formed between the body and the installation portion.
 5. The abutment of claim 4, wherein the installation portion has an outer diameter smaller than an outer diameter of the body.
 6. The abutment of claim 2, wherein the installation portion has a surface of a D shape or a polygonal shape.
 7. The abutment of claim 4, wherein the sectional surface is formed at a portion of a side of the body.
 8. The abutment according to claim 7, wherein the body has a surface of a letter D shape or a polygonal shape, which is in contact with the sectional surface. 